Glazing bar



H. RADNALL GLAZING BAR May 15,1951

2 sheetssheet 1 Filed June 11, 1946 INVEN TOR ATTORNEY.

H. RADNALL.

May 15, 1951 GLAZING BAR 2 Sheets-Slleefl 2 Filed June 11, 1946 INVENTOR w* @a1 ATTORNEY Patented May 15, 1951 t OFFICE GLAZING BAR Herbert Radnall, Birmingham, England Application June 11, 1946, Serial N0. 675,990 In Great Britain June 19, 1945 3 Claims. (Cl. 10S- 16) This invention relates to metal glazing bars of the kind which include parts for supporting the glass or like glazing sheets, and a part co-operating with a capping strip, which strip serves to engage the upper surface of the sheets near one edge thereof and holds them on their seating, and also serves to exclude rain water from said edge, the object of the invention being to provide an improved bar and capping strip fixing.

Referring to the drawings:

Figure l is a side elevation showing a part of a glazing bar and capping strip for supporting glass roofing sheets, the device being illustrated with the capping strip and sheets in position.

Figure 2 is an end view of the same construction.

Figure 3 is a sectional View on the lines 3-3 of Figure 1.

Figure 4 is a detached perspective view of the same construction with the glazing sheets re moved.

` Figure 5 is a detailed perspective view of the saine construction.

Figure 6 is a view similar to Figure 4 showing a modication.

Figure 7 is a cross sectional View of Figure 6 showing the parts assembled.

In the construction illustrated in Figures l to 5 of the drawings, the glazing bar is indicated generally at l and is supported from the roof rafters, not shown, by means of brackets indicated generally at Il so that the bar extends in a substantially horizontal position.

`The bar includes a substantially vertical web I2 and from the lower portion of this, parts I3 project laterally and upwardly to form continuous supports for two adjacent sheets I4 of glass, these supporting parts having grooves l along their upper edges for receiving packing strips I6 upon which the glass sheets rest.

The upper edge of the web l2 is formed with an integral iiange I'l of generally rectangular section which is provided on each side face with a longitudinal groove I8 of dove-tail section, and

the glazing bar of the configuration above indi cated is formed of non-ferrous metal which is wise movement along the grooves by upsetting the'V metal of one side of the grooves at opposite ends of the locking plates as indicated at 2| in Figure 4.

Alternatively, the projections may be providedby short lengths of rods, the ends of which simi-- larly project beyond the faces of the bar, and in. this case the grooves may be dispensed with.

y The capping strip indicated at 22 of the draw, ing is also of extruded non-ferrous metal and is formed of channel section inverted in the drawing, the edges of the side members of the channel each having an inwardly directed flange 23, the distance between which flanges corresponds` with the width of the glazing bar flange I1, and these nanges are cut away or recessed at intervals-. as indicated at 24 to correspond with `the distances between the locking plates I9 and arel adapted to pass over the projecting ends: of these` locking plates.

The edges of the side members of the channelshaped capping strip are provided also withoutwardly extending iianges 25 which are bent down slightly and are adapted each to engage with the outer face of a corresponding glass sheet.

This downward inclination assists in discharging rain water from the capping strip.

When the glass sheets are in position on the glazing bar in the manner indicated in Figure 3, the capping strip is positioned by moving it per" pendicular to its length and to the length of thel glazing bar so that the projecting ends of the locking plates pass through the recesses 24, whereupon the capping strip is slidden so. that the lower side of each locking plate engages with the adjacent face of the inwardly directed flange 23 and the capping strip is retained in position.

1n order to ensure that, after the capping strip has been slidden, its end is in line with the corresponding end of the glazing bar, the latter is provided at one end with a bracket 2&5 or" U shape shown in Figure 5 which is secured to the lower` edge of the glazing bar web by bolts 21 passing through openings in the bracket and in the web and the bracket has a pair of upstanding arms 28 which engage with the outwardly directed cap. ping strip flanges 25 and serve incidently to locate the glazing sheets against endwise move-U ment in relation to the glazing bar. Y

To facilitate removal of the capping strip from the glazing bar, the inwardly directed anges 23 at one end only of the recesses 24 are bent slightly upwardly as indicated at 29 in Figure 4 so that when the capping strip is slidden in a direction away from the bracket 26, it cannot 3 'I'nov bynd a position in which the locking plate projections and recesses correspond, any further movement being prevented by the -bent parts 29 engaging with the adjacent ends of the projecting locking plates.

Instead of providing the projections on the glazing bar, they may be provided on the capping strip as in the construction illustrated in Figures 6 and 7 of the drawings, wherein the projections comprise locking plates 30 of L shape a-nd formed to slightly dove-tailed configuration as will b e apparent from Figure 7, and these L shaped locking plates are securedat intervals in the space between the inwardly directed flange ,2 3 and the upper part of the capping strip on Vboth sides of the same at intervals spaced along the length of the strip, so that one flange 3l of :the locking plate projects inwardly and opposed to a corresponding flange on an opposite plate.

The metal of the flanges 23 is bent outwardly at opposite ends o1 the looking plates as indicated at 32 of the drawing, and thus serves lto locate the locking plates against endwise movement in relation to the capping strip, while the bent-up parts A32 co-operate with the dove-tail shaped locking plates Vin retaining them against inward movement in relation to the capping strip.

In such a construction the flange -Il of the glazing bar is made of a depth less than in the preceding construction and is provided merely with spaced vopenings `3ft lformed by cutting away the `metal :of the iange, through which openings the flanges 3l of the locking plates are adapted to ipass so that -the capping strip is secured in position ina manner similar Yto that of -the preceding construction.

lTo facilitate the removal of the capping strip the metal vof the `glazing 'bar ange Il ris `bent downwardly slightly -at one end of each of the openings 33 as indicated at 34 in Figure l6, so that the flanges 3l are located opposite -to the openings duringvthe movement of removing the capping strip from the glazing bar. Y

In each of the constructions above described it will be understood that the capping strip is made Yof the same length as the 'glazing bar upon which it is mounted,l and to Vpermit of it being mounted .in :position on the glazing bar and removed therefrom 1in the manner described, the bracket 125 shown in Figure 5 is .provided at one end only of the glazing bar, the other end vb eing free from obstructions to permit of the necessary relative sliding movement -between the capping strip and glazing bar.

In'the constructions illustrated in the drawings, the glazing bar and capping strip is shown extending in a substantially horizontal position, but these members may, of course, be inclined to the horizontal, and in the latter ca se the bracket 26 is disposed at a lower end of the two members so that the lower end of the capping strip Kabuts against the arms 28 -of the `bracket which serve vto locate it against downward Amovement -relative to the glazing bar.

The present invention .possesses the great advantage that the cappingstrip can'veryreadily and Vquicklybe `mounted in position onthe glazing @bar :and .removed .equally readily therefrom, and when in position it is retained in Aplaceon the glazing bar so that the roofing sheets are held firmly in position, while at the same time the ready detachability of the capping strip enables the roofing sheets to be quickly replaced when desired.

The parts may be made,'for example, of extruded or rolled metal, either ferrous or none ferrous.

What I claim then is:

1. In combination a capping strip and a glaz'- bar, said glazing bar including a web having parts for supporting glazing sheets, said web havin-g a longitudinal groove on opposite sides thereof, locking :plates mounted in said grooves spaced at intervals along the length of said glaz-i ing bar and projecting from said grooves, said capping strip having oppositely facing recesses spaced apart along the length of the capping strip at intervals corresponding to the spacing of the locking plates, said locking plates and recesses coeoperating with one another and being adapted to permit of the capping strip engaging with the glazing bar by a movement substantially perpendicular of the length ,of the two members followed by a sliding movement substantially paralle! ,t9 their lengths.

2. vA .device according to claim l, wherein the grooves are of dove-tailed form in'cross section, the locking plates being shaped to correspond therewith, and the metal of the glazing bar at each end of the locking plates and at one side of the said grooves being displaced in a `direction transverse yto the length of the grooves into engagement .with vthe adjacent .end of the Alocking plate.

3. In combination a capping strip and a .glazapart at intervals along the length of said glazi ing bar, said capping strip having oppositely facing recesses spaced apart on the length of the capping strip at intervals Corresponding to the spacing of the projections, said projections and recesses co-operating with one another and being adapted to jpermit of the capping strip engaging with the glazing bar by a movement substantially perpendicular of `the length of the two members followed -by Va sliding movement substantially parailel to their lengths.

HERBERT YRADNALL REFERENCES VCITED The following references are of recordin the file of this patent:

UN'JSED ,STATES PATENTS Number Name lDate y370,075. `Macleod Sept-20, 1887 :1,168,942 Irwin V Jan. 18, 1916 

